Added tests for major versions of packages

Author: Andrey Helldar

.github/workflows/phpunit.yml

@@ -9,8 +9,9 @@ jobs:
             fail-fast: true
             matrix:
                 php: [ "7.2", "7.3", "7.4", "8.0" ]
+                support: [ "2.0", "3.0" ]
 
-        name: PHP ${{ matrix.php }}
+        name: PHP ${{ matrix.php }}, Support ${{ matrix.support }}
 
         steps:
             -   name: Checkout code
@@ -27,7 +28,9 @@ jobs:
                 run: composer self-update
 
             -   name: Install dependencies
-                run: composer update --prefer-stable --prefer-dist --no-progress --no-interaction
+                run: |
+                    composer require andrey-helldar/support:^${{ matrix.support }}
+                    composer update --prefer-stable --prefer-dist --no-progress --no-interaction
 
             -   name: Execute tests
                 run: sudo vendor/bin/phpunit